package com.example.fina2202.day07;

public class T {
    StringBuilder builder = new StringBuilder("a");

    public static void main(String[] args) {
        T t = new T();
        t.builder.append("b");

        T t1 = new T();
        t1.builder.append("hello");
        System.out.println(t1.builder);  //ahello

        System.out.println(t.builder);  //ab
    }
}
